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Class Information
Number: 175/267
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by fluid pressure
Description: Apparatus in which the laterally movable cutter element is moved laterally by means of a fluid under pressure acting against the cutter element or a below ground part attached thereto.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7506703 |
Drilling and hole enlargement device |
Mar. 24, 2009 |
| 7467671 |
Drill bit with protection member |
Dec. 23, 2008 |
| 7383900 |
Drill bit and system for drilling a borehole |
Jun. 10, 2008 |
| 7293616 |
Expandable bit |
Nov. 13, 2007 |
| 7182157 |
Enlarging well bores having tubing therein |
Feb. 27, 2007 |
| 7090038 |
Bedrock drilling and excavating apparatus |
Aug. 15, 2006 |
| 6991046 |
Expandable eccentric reamer and method of use in drilling |
Jan. 31, 2006 |
| 6973978 |
Drilling tool having an expandable bladder and method for using same |
Dec. 13, 2005 |
| 6959774 |
Drilling apparatus |
Nov. 1, 2005 |
| 6953096 |
Expandable bit with secondary release device |
Oct. 11, 2005 |
| 6929076 |
Bore hole underreamer having extendible cutting arms |
Aug. 16, 2005 |
| 6851491 |
Internal pressure indicator and locking mechanism for a downhole tool |
Feb. 8, 2005 |
| 6732817 |
Expandable underreamer/stabilizer |
May. 11, 2004 |
| 6679328 |
Reverse section milling method and apparatus |
Jan. 20, 2004 |
| 6668949 |
Underreamer and method of use |
Dec. 30, 2003 |
| 6615933 |
Downhole tool with extendable members |
Sep. 9, 2003 |
| 6595302 |
Multi-blade underreamer |
Jul. 22, 2003 |
| 6402432 |
Method for installing load bearing piles utilizing a tool with blade means |
Jun. 11, 2002 |
| 6217260 |
Downhole reamer with double acting dual piston cylinder |
Apr. 17, 2001 |
| 6041874 |
Tubular actuator component for use in a drill string |
Mar. 28, 2000 |
| 5971085 |
Downhole unit for use in boreholes in a subsurface formation |
Oct. 26, 1999 |
| 5853054 |
2-Stage underreamer |
Dec. 29, 1998 |
| 5808052 |
Use of cellulose mixed ethers as additives for earth pressure shields |
Sep. 15, 1998 |
| 5472057 |
Drilling with casing and retrievable bit-motor assembly |
Dec. 5, 1995 |
| 5385205 |
Dual mode rotary cutting tool |
Jan. 31, 1995 |
| 5368114 |
Under-reaming tool for boreholes |
Nov. 29, 1994 |
| 5271472 |
Drilling with casing and retrievable drill bit |
Dec. 21, 1993 |
| 5255741 |
Process and apparatus for completing a well in an unconsolidated formation |
Oct. 26, 1993 |
| 5253708 |
Process and apparatus for performing gravel-packed liner completions in unconsolidated formations |
Oct. 19, 1993 |
| 5242017 |
Cutter blades for rotary tubing tools |
Sep. 7, 1993 |
| 5201817 |
Downhole cutting tool |
Apr. 13, 1993 |
| 5197553 |
Drilling with casing and retrievable drill bit |
Mar. 30, 1993 |
| 5184687 |
Well reamer |
Feb. 9, 1993 |
| 5174374 |
Clean-out tool cutting blade |
Dec. 29, 1992 |
| 5141063 |
Restriction enhancement drill |
Aug. 25, 1992 |
| 5107943 |
Method and apparatus for gravel packing of wells |
Apr. 28, 1992 |
| 5103921 |
Coring assembly for mounting on the end of a drill string |
Apr. 14, 1992 |
| 5090480 |
Underreamer with simultaneously expandable cutter blades and method |
Feb. 25, 1992 |
| 5074366 |
Method and apparatus for horizontal drilling |
Dec. 24, 1991 |
| 5060736 |
Steerable tool underreaming system |
Oct. 29, 1991 |
| 5060738 |
Three-blade underreamer |
Oct. 29, 1991 |
| 5036921 |
Underreamer with sequentially expandable cutter blades |
Aug. 6, 1991 |
| 4976323 |
Counterboring device for wells |
Dec. 11, 1990 |
| 4971163 |
Drilling bucket apparatus for cast-in-place piles with expanded bottoms |
Nov. 20, 1990 |
| 4915181 |
Tubing bit opener |
Apr. 10, 1990 |
| 4889197 |
Hydraulic operated underreamer |
Dec. 26, 1989 |
| 4875738 |
Arm-supported cutting roll with effective length pivotally adjustable along mining face |
Oct. 24, 1989 |
| 4809793 |
Enhanced diameter clean-out tool and method |
Mar. 7, 1989 |
| 4715440 |
Downhole tools |
Dec. 29, 1987 |
| 4618009 |
Reaming tool |
Oct. 21, 1986 |
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